This system of equations has no solution.
-1 - (-7) = 6
5 - (-1) = 6
11 - 5 = 6
The common difference is 6.
If you add 6 to a term, you get the next term.

Jay's claim is false. They would have $156.8 left which is 56% of their original combined total.
Ok so 1.2 is the answer you get if you divide them
and you can also say one because its counting by ones
We take 2 marbles from 20 marbles and the total ways is 20x19:2=190
But we need only 2 red marbles and the ways is 14x13:2=91
And finally we do the division 91:190=91/190 is the probability we need